A corpora



D. HOYT.

SASH LOCK.

y AAAAAAAAAAAAAAAAA An. 999999 z. v 1 1 95,586. Patented Aug. 22, 1916.

. 2 EEEEEEEEEEEE l D.' HOYT.

lsAsH LocK. l APPLICATION FILED MAFLZB, 1912.

Patented Aug. 22, 1916.

2 SHEETS-SHEET 2.

d. Q gyn/Q.

DANIEL HOYT, OF EAST ORANGE, JERSEY, ASSIGNOR'OF ONE-'HALF TO THE NATIONAL LOCK WASHER COMPANY,

TION 0F NEW JERSEY.

SASI-I-LOCK.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Applicatonled March 29, 1912. Serial Noi 686,989.

To all whom t may concern.'

Be it known that I, DANIEL HoY'i, a citizen of the United States, residing in the city of East Orange, in the county of 'Essex' and State of New Jersey, have invented ceroperating camsfof the lock, with a toothed or corrugated rack on the window frame, the cams being thrown into engagement with said rack by spring pressure, the locking being produced by cam action and released byv finger pieces.

Cam sash locks and-racks as heretofore used, are shown in my Patents-No. 651,570,

June ,12th, 1900; No. y 696,819, April- 1st, 1902; and No. 829,715, August 28th, 1906.

My invention therefore has for its object to provide a sash lock and rack, the construction of which makes it impossible for the cams of the lock to be jammed orbound in the rack.

Another object is to so construct the lock and rack that when thesash is left slightly open, and near its 4closed position, neither cam will lock the sash, but the sash will of its own weight, close down onthe sill and lock itself in a closed position.

Another Objectis t0 provide the lock and rack with means for centrally guiding the sash in the window frame, thereby preventing the side edges of. thesash from dragging on the side casing of the window. frame, at the same time preventing excessive side play of said sash.

Another object is toso construct the lock and l rack, that should the sash be fitted loosely between the inside and outside stops of the window, said sash will-be held against lateral movement. y

Other objects will appear from the description hereinafter given.

The invention is illustrated in the accompanying drawings, which form part of this specification, the letters of reference' ndicating the several and similar parts in the respective figures, and in which- Figure 1 represents a front view of a window containing my improved sash locks and racks. Fig. 2 repr'esents'a horizontal sectional view on line xof Fig. 1. Fig. 3 represents one corner of a sash, with the sash lock attached, the top of the lock casing being broken away to more clearly illustrate the detailed constructionthereof. Fig. 4 represents ay horizontal section taken on line mof Fig. 3. Figs. 5 and 6 represent respectively, a front and sectional side elevation of my improved rack. Fig. 7 represents a front elevation of my improved lock, with part of the lock casing broken away; and Figs. 8,9 and 10 represent similar views of my improved lock, in'combination with a corner of the sash and `part of the rack, illustrating' the different positions of the locking cams on the rack.

Referring to the drawings, A represents the sash and B the window casing.

The sash lock which may be secured to the window sash-in Vany well-known manner, consists essentially of the metallic casing a and the removable cover plate t. The casing is provided with a fixed center post c, which forms a fulcrum for the arms of the spiral coil spring d, to which the removable Vcover plate b is secured.

e and e represent cam levers, and y represents a fixed `pivot or axis on which the said cam levers partially revolve. These cam levers at their outer ends, adjacent to the ywindow frame, are provided with cam faces g and g', said faces'being formed at an acute angle to the plane of said levers, and are further provided' at their inner ends which project outside of the casing a with integral operating levers or finger pieces z, and 71X Yformed-by widening said ends.

The engaging face of the lower cam g is provided with corrugations or teeth, while the upper cam g has a smooth bearing face, the upper part of said bearing face being provided with a sharp angled, constituting a locking tooth. The ends of the arms of the spring CZ bear againstthe cam'levers, constantly tending `to force the same apart, and to force the cams outward. The edge of the casing a nearest the window casing, is provided with an outwardly extending guide designed to engage with the guide 7s,

cent to said guide 7c is corrugated, as shown,

to correspond to the corrugations on the cam face g of the cam lever e. These corrugations may be made of any desired shape or size. The corrugated portion of the rack `Z is 'made wide enough to prevent the cams from contacting with the marginal guide 7c, which extends along the entire length of the rack, thereby allowing for the maximum lateral movement of the sash and lock in the window frame, and in order that the lock casing may never strike the corrugated portion of the rack, said casing is provided with an outwardly projecting guide y' which is formed integral therewith, said guide being designed to contact with the marginal guide 7c of the rack, which projects outside of the corrugations in the rack, as clearly indicated in dotted lines in Fig. 2 of the drawings. In the drawings, I have shown the lower portion of said rack Z, near the bottom of the window, with a smooth portion at the upper termination of which a shoulder fm. is formed by the under side of the bottom tooth or corrugation, the function of which will be presently described. This rack is secured to the window stop at an angle corresponding with the angle of the cam faces g and g. In the drawings, I have shown two locks and two racks on the window, and although this is preferable, it is not essential.

In securing the racks -Z to the window stops, it is essential that the corrugated faces thereof squarely face the cam faces g and g of the cam levers c and e', with the guide 7c of said rack extending slightly beyond the window stop, as clearly indicated in Figs. 2 and 4 of the drawings. The sash is then set squarely in the window frame, so that neither side edge thereof contacts with the side of the window frame, as clearly indicated in Fig. 2 of the drawings. The locks are then secured to the` sash, one near each corner thereof and in such a manner that the guide or engaging rib y' of the casing a will be in close proximity toand parallel with the guide or engaging rib 7c on the rack Z, so that should the sash be moved either to the right or to the left the guide or metallic rib y' on the lock casing will contact with the guide or metallic rib 7c on the rack Z, thereby insuring a `sliding contact which will be smooth and easy, and at the same time, eliminating any possibility of the side edges of the sash contacting with the sides of the window frame, vthus enabling the sash to be positively and centrally guided in the window frame. When the finger pieces Zz and Zt are compressed together against the stop n on the casing a, the cam levers c and e partially revolve on the fixed pivot or axis f in opposite directions, thereby causing the engaging cam faces g and g to be drawn within the metallic casing a, and the sashis free to move. When the sash is in a raised position and the finger pieces ZL and t are released, the cam faces 7 and g will engage the rack, being forced into engagement therewith by means of the spring aZ, causing the teeth or corrugations on the cam face g to enter and engage with the teeth or corrugations of the rack Z, thereby locking the sash against falling, and inasmuch as the engaging faces of said cams are formed at an acute angle to the plane of said levers and Iarranged at a corresponding angle to the corrugations or teeth on the rack Z, a wedging action takes place between the sash and rack which enables the sash to be forced away from the inside window stop and outwardly against the outside window stop locking it in that position against lateral movement.

By the use of the cams of the character described, it will be apparent that the heavier the sash or the greater the jolting of the car, the tendency of the cams will be to lock the sash tighter. When the sash is in the elevated position, the upper cam faces g which are provided with a smooth surface cannot enter the teeth or corrugations of the rack Z and therefore have no locking function at that point, thus providing means for successfully preventing the cams from jamming, one in an upward and the other in a downward direction, in the rack, which has frequently been the case where both cam faces are provided with teeth or corrugations, which simultaneously enter the teeth or corrugations of the rack.

It quite frequently happens that the window is left partlv open a small distance from its closed position. In order to provide ready means for automatically locking and closing the same, I have provided the lower portion of the rack Z with aV smooth portion and a shoulder m, so that when the window is left in the position illustrated in Fig. 9 of the drawings, the lower cam face g bears against the smooth portion of the rack Z while the upper cam face g bears against the teeth of the rack in which position neither cam face has locking engage-v ment with the teeth of therack and the sash of its own weight will therefore settle down on the window sill, thereby forming a tight joint, the cams simply acting as a brake 'in order that the descent of the sash from this point on will be gradual. Just before the sash reaches the window sill the sharp angle z' on the upper smooth cam face g will snap into engagement with the shoulder m on the rack, locking the sash in its closed position, as shown in Fig. 10 of the drawings.

The present invention provides a very simple and exceedingly efficient sash lock and rack, and I believe that I am the first to use a pair of cam levers provided with unlike bearing faces in combination with a rack. And, that I am the first to use a cam lever, the face of which is formed at an acute angle to the plane of said lever and the inner end widened to form a nger-piece and in combination with a rack. And that I am the first to use a cam sash lock and rack where there is a Zone in which neither cam will lock, but act as a b lake. And that I am the first to use a sash lock and rack with a guide on the lock and a guide on the rack and I desire to claim these features broadly.

It will be readily understood that with my improved construction, it will be impossible for the cams of the lock to become jammed in the rack; that should the sash be left slightly open, the sash of its own weight will close down on the sill and lock itself in a closed position; that the sash at all times will be held against lateral movement, and, lastly, that the side edges of the sash are prevented from dragging on the side casing of the window frame, thereby preventing excessive side play of said sash.

lVhile I have shown my preferred form, it will be understood that many modifications inay be made to accomplish the same results without departing from the spirit of the invention.

I claim:

1. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a metallic rack secured to the window frame and having corrugations on its face, a sash lock secured to the sash adjacent the metallic rack, comprising a metallic casing, an upper and lower cam lever pivoted within the casing, adapted to lock the sash, said cams having unlike bearing faces, whereby but one cam can be in locking engagement with the corrugated rack at the same time, and means to force the cams into engagement with the corrugated strip and means to unlock the sash.

2. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a rack secured to the window frame and having corrugations on the face of the upper portion and a smooth lower portion, a sash lock secured to the sash adjacent the rack comprising a casing, an upper and lower cam lever pivoted withinthe casing adapted to bear against the rack to lock the sash in the raised position and also in its closed position, but acting on the smooth portion of the rack as a brake, whereby the sash may settle on the window sill and form a tight joint, means to force the cams against the rack and means to withdraw the cams from the rack.

3. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a metallic rack secured to each side of the window frame having corrugations on its face and a guide extending above the corrugations and along its entire length, sash locks secured to the sash adjacent the metallic rack on the frame including a metallic casing formed with a projecting rib or guide extending above the plane of the casing and along its entire length to maintain the sash central inthe window frame and free from contact with the side casing.

4. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a rack secured toathe frame having the upper portion corrugated and a smooth lower portion, a sash lock on the sash having an upper and lower cam lever said Cam levers having unlike bearing faces to lock the sash in the raised position and also in the closed position, but acting on the smooth portion as a brake, means to force the cams against the rack and means to withdraw the same from said rack.

5. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a corrugated rack on the frame having a guide along one edge thereof and extending above the corrugations, a sash lock on the sash having a guide, an upper and lower cam lever having cam engaging faces formed at an acute angle to the plane of the lever, means to force the cams against the rack and means to withdraw them from engagement.

6. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a rack secured to the window frame and having a smooth portion, a cam sash lock secured to the sash adjacent the rack and having means to bear against the rack to retard the movement of the sash in the window frame, a spring to force the bearing means against the rack, and finger pieces to withdraw the bearing means from contact with the rack.

7. In a sash fastener adapted to be placed on a sash slidably arranged within a window frame, a rack secured to the frame having corrugations or slots on the face and a guide along one edge extending above the face thereof, a sash lock on the sash comprising a case and provided with a guide extending above the plane of said case and along the inner edge thereof, locking means within the case adapted to engage the rack to lock the sash, and means to actuate the locking means whereby the sash may move outward against the outside window stop and the lock casing is prevented from contacting with the corrugations on the rack.

8. In a sash fastener adapted to be placed on a sash and slidably arranged in a window frame, a rack secured to the frame at an angle to the sash and having a corrugated and a smooth portion, a cam sash lock se- This specification signed and witnessed cured to the sash adjacent the rack and havthis 26th day of March, 1912. ing means to engage the rack to lock the DANIEL HOYT. sash, said means being formed at an :ingle Witnesses:

5 to the plane of the lock and finger pieces to FREDK C. FISCHER,

release the said lock. CLIFFORD A. ALLITSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

